Table 1.
Description of the study sample and periodontal measures by explanatory variables.
| Explanatory Variables | Study Sample (n = 1936) | Teeth with PD | Teeth with CAL | |||
|---|---|---|---|---|---|---|
| n | % | Mean | (SD) | Mean | (SD) | |
| Ethnicity | ||||||
| White British | 547 | 28.3% | 8.7 | (8.7) | 6.2 | (3.9) |
| White Other | 158 | 8.2% | 9.3 | (8.7) | 6.3 | (4.9) |
| Black African | 286 | 14.8% | 10.5 | (8.7) | 7.6 | (5.0) |
| Black Caribbean | 90 | 4.7% | 9.6 | (8.2) | 5.1 | (4.1) |
| Black Other | 137 | 7.1% | 8.6 | (8.0) | 6.1 | (3.5) |
| Pakistani | 206 | 10.6% | 14.2 | (11.0) | 7.6 | (4.4) |
| Indian | 112 | 5.8% | 14.7 | (10.5) | 7.5 | (4.5) |
| Bangladeshi | 73 | 3.8% | 17.4 | (8.9) | 7.6 | (5.5) |
| Asian Other | 327 | 16.9% | 14.9 | (11.1) | 5.8 | (3.3) |
| p-value a | <0.001 | 0.158 | ||||
| Nativity | ||||||
| Native-born | 873 | 45.1% | 9.8 | (9.4) | 5.9 | (3.4) |
| Foreign-born | 1063 | 54.9% | 12.7 | (10.1) | 7.1 | (4.8) |
| p-value a | <0.001 | <0.001 | ||||
| Education | ||||||
| Low | 652 | 33.7% | 10.7 | (9.2) | 6.9 | (4.6) |
| Medium | 490 | 25.3% | 12.2 | (10.3) | 7.5 | (4.7) |
| High | 794 | 41.0% | 11.3 | (10.2) | 5.8 | (3.4) |
| p-value a | 0.154 | 0.003 | ||||
| Sex | ||||||
| Men | 623 | 32.2% | 12.1 | (10.0) | 5.0 | (7.1) |
| Women | 1313 | 67.8% | 11.0 | (9.8) | 3.8 | (6.4) |
| p-value a | 0.103 | 0.002 | ||||
| Age group | ||||||
| 16–24 years | 165 | 8.5% | 9.1 | (9.4) | 1.7 | (4.5) |
| 25–34 years | 712 | 36.8% | 12.0 | (10.1) | 3.6 | (6.5) |
| 35–44 years | 710 | 36.7% | 11.0 | (10.1) | 3.8 | (6.2) |
| 45–54 years | 208 | 10.7% | 11.8 | (9.1) | 6.6 | (7.6) |
| 55–65 years | 141 | 7.3% | 11.9 | (9.1) | 8.1 | (7.7) |
| p-value a | 0.375 | <0.001 | ||||
a: from a simple negative binomial regression model fitted for each periodontal measure.